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-rw-r--r--compiler/GHC/Core/Opt/CSE.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Core/Opt/CSE.hs b/compiler/GHC/Core/Opt/CSE.hs
index d6f37f6eb5..019b578db2 100644
--- a/compiler/GHC/Core/Opt/CSE.hs
+++ b/compiler/GHC/Core/Opt/CSE.hs
@@ -775,7 +775,7 @@ csEnvSubst :: CSEnv -> Subst
csEnvSubst = cs_subst
lookupSubst :: CSEnv -> Id -> OutExpr
-lookupSubst (CS { cs_subst = sub}) x = lookupIdSubst (text "CSE.lookupSubst") sub x
+lookupSubst (CS { cs_subst = sub}) x = lookupIdSubst sub x
extendCSSubst :: CSEnv -> Id -> CoreExpr -> CSEnv
extendCSSubst cse x rhs = cse { cs_subst = extendSubst (cs_subst cse) x rhs }